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Fe3O4-BiOBr/Graphene磁性气凝胶的构筑与Cr(VI)污水净化

铁伟伟 邱帅彪 王红霞 袁双义 董旭 何伟伟

铁伟伟, 邱帅彪, 王红霞, 等. Fe3O4-BiOBr/Graphene磁性气凝胶的构筑与Cr(VI)污水净化[J]. 复合材料学报, 2024, 41(4): 1987-1996. doi: 10.13801/j.cnki.fhclxb.20230911.001
引用本文: 铁伟伟, 邱帅彪, 王红霞, 等. Fe3O4-BiOBr/Graphene磁性气凝胶的构筑与Cr(VI)污水净化[J]. 复合材料学报, 2024, 41(4): 1987-1996. doi: 10.13801/j.cnki.fhclxb.20230911.001
TIE Weiwei, QIU Shuaibiao, WANG Hongxia, et al. Construction of magnetic Fe3O4-BiOBr/Graphene aerogel and Cr(VI) wastewater purification[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 1987-1996. doi: 10.13801/j.cnki.fhclxb.20230911.001
Citation: TIE Weiwei, QIU Shuaibiao, WANG Hongxia, et al. Construction of magnetic Fe3O4-BiOBr/Graphene aerogel and Cr(VI) wastewater purification[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 1987-1996. doi: 10.13801/j.cnki.fhclxb.20230911.001

Fe3O4-BiOBr/Graphene磁性气凝胶的构筑与Cr(VI)污水净化

doi: 10.13801/j.cnki.fhclxb.20230911.001
基金项目: 河南省国家级大学生创新创业训练项目 (202110480014);河南省高等学校青年骨干教师培养计划(2021GGJS145);河南省高等学校重点科研项目(22A430036)
详细信息
    通讯作者:

    铁伟伟,博士,副教授,研究方向为纳米光电材料 E-mail: tieww929@163.com

  • 中图分类号: O614.24+;TB333

Construction of magnetic Fe3O4-BiOBr/Graphene aerogel and Cr(VI) wastewater purification

Funds: National Innovation and Entrepreneurship Training Program for College Students of Henan Province (202110480014); Youth Backbone Teacher Funding Project in Universities of Henan Province (2021GGJS145); Key Scientific Research Project in Universities of Henan Province (22A430036)
  • 摘要: 为改善单一半导体粉体材料的光生电子-空穴分离和回收能力,基于功能协同效应,采用共沉淀法,将Fe3+/Fe2+盐在一定浓度的氨水作用下制备出纳米Fe3O4,并分散于含有溴化十六烷基三甲铵(CTAB)的正辛烷中,提供Br的同时,在室温下与水溶液中的硝酸铋和柠檬酸相互作用,利用非互溶体系,制备出Fe3O4-BiOBr;最后,将Fe3O4-BiOBr分散于含有赖氨酸的氧化石墨烯水溶液中,通过一步水热法合成Fe3O4-BiOBr协同修饰的磁性石墨烯气凝胶(Fe3O4-BiOBr/Graphene)。样品的晶体结构、形貌特征和催化活性通过XRD、Raman、XPS、SEM、TEM、UV-Vis光谱等综合测试技术进行了表征分析。Fe3O4-BiOBr/Graphene复合材料中的Fe3O4呈类球状,尺寸约10~25 nm,均匀镶嵌于BiOBr片层中间,并与石墨烯之间相互作用,整体呈现球-片-空洞构造。Fe3O4-BiOBr/Graphene复合材料显示出良好的可见光吸收性和Cr(VI)还原活性,30 min内可去除Cr(VI)至100%,高于单一组分的磁性Fe3O4,这可能与Fe3O4-BiOBr异质结构、石墨烯导电材料的引入及Fe3O4-BiOBr/Graphene三者之间良好的界面相互作用,有效地促进了光生电子与空穴的分离效率有关。

     

  • 图  1  Fe3O4-BiOBr/Graphene-1的宏观照片

    Figure  1.  Photographs of Fe3O4-BiOBr/Graphene-1

    图  2  Fe3O4 (a)、Fe3O4-BiOBr (b)和Fe3O4-BiOBr/Graphene-1 ((c), (d))的SEM图像

    Figure  2.  SEM images of Fe3O4 (a), Fe3O4-BiOBr (b) and Fe3O4-BiOBr/Graphene-1 ((c), (d))

    图  3  Fe3O4-BiOBr/Graphene-1的TEM图像

    Figure  3.  TEM image of Fe3O4-BiOBr/Graphene-1

    图  4  Fe3O4、BiOBr、Fe3O4-BiOBr和Fe3O4-BiOBr/Graphene-1的XRD图谱

    Figure  4.  XRD patterns of Fe3O4, BiOBr, Fe3O4-BiOBr and Fe3O4-BiOBr/Graphene-1

    图  5  氧化石墨烯(GO)和Fe3O4-BiOBr/Graphene-1的拉曼图谱

    Figure  5.  Raman spectra of graphene oxide (GO) and Fe3O4-BiOBr/Graphene-1

    图  6  Fe3O4、Fe3O4-BiOBr和Fe3O4-BiOBr/Graphene-1的XPS图谱(a)及Fe2p (b)和Bi4f (c)的XPS高分辨图谱

    Figure  6.  XPS spectra (a) and Fe2p (b), Bi4f (c) XPS high-resolution spectra of Fe3O4, Fe3O4-BiOBr and Fe3O4-BiOBr/Graphene-1

    图  7  Fe3O4、BiOBr、Fe3O4-BiOBr和Fe3O4-BiOBr/Graphene-1的UV-Vis DRS光谱图

    Figure  7.  UV-Vis DRS spectra of Fe3O4, BiOBr, Fe3O4-BiOBr and Fe3O4-BiOBr/Graphene-1

    图  8  Fe3O4-BiOBr/Graphene系列样品在模拟太阳光照射下对Cr(VI)的光催化活性曲线

    Figure  8.  Photocatalytic activity curves of Cr(VI) in the presence of series of Fe3O4-BiOBr/Graphene samples under sunlight irradiation

    Ct—Concentration of Cr(VI) at time t; C0—Initial concentration of Cr(VI)

    图  9  Fe3O4-BiOBr/Graphene-1的电子顺磁共振(ESR)图谱

    Figure  9.  Electron spin resonance (ESR) spectra of Fe3O4-BiOBr/Graphene-1

    图  10  Fe3O4和Fe3O4-BiOBr/Graphene-1的磁滞回线图谱

    Figure  10.  Hysteresis loop spectra of Fe3O4 and Fe3O4-BiOBr/Graphene-1

    图  11  Fe3O4、BiOBr、Fe3O4-BiOBr和Fe3O4-BiOBr/Graphene-1的瞬态光电流图谱

    Figure  11.  Photocurrent spectra of Fe3O4, BiOBr, Fe3O4-BiOBr and Fe3O4-BiOBr/Graphene-1

    图  12  模拟太阳光下Fe3O4-BiOBr/Graphene-1复合材料对污染物Cr(VI)的光催化还原示意图

    Figure  12.  Photocatalytic reduction mechanism of Fe3O4-BiOBr/Graphene-1 composite onto Cr(VI) under sunlight irradiation

    表  1  系列Fe3O4-BiOBr/Graphene气凝胶

    Table  1.   Series of Fe3O4-BiOBr/Graphene aerogel

    Sample Graphene
    oxide/(g·mL−1)
    Fe3O4-BiOBr/g
    Fe3O4-BiOBr/Graphene-1 4.2 0.40
    Fe3O4-BiOBr/Graphene-2 5.0 0.35
    Fe3O4-BiOBr/Graphene-3 5.0 0.40
    Fe3O4-BiOBr/Graphene-4 3.5 0.40
    下载: 导出CSV

    表  2  Fe3O4-BiOBr/Graphene-1气凝胶的物理性能

    Table  2.   Physical properties of Fe3O4-BiOBr/Graphene-1 aerogel

    Sample BET surface
    area/(m2·g−1)
    Pore size/
    nm (4 V/A
    by BET)
    Pore
    volume /
    (cm3·g−1)
    Porosity/
    %
    Fe3O4-BiOBr/
    Graphene-1
    47.8902 17.14143 0.205227 85.5914
    Note: BET—Brunauer-Emmett-Teller.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-06-13
  • 修回日期:  2023-08-18
  • 录用日期:  2023-08-29
  • 网络出版日期:  2023-09-12
  • 刊出日期:  2024-04-15

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